Temperature-Jump Relaxation Magic-Angle Spinning NMR Study of the Methyl tert-Butyl Ether Reaction in a Boron Pentasil Zeolite

Temperature-jump relaxation magic-angle spinning NMR experiments are for the first time applied to study a heterogeneously catalyzed reaction. A temperature jump from 20 to 100−150 °C creates a nonequilibrium state of the system consisting of methyl tert-butyl ether (MTBE), methanol, and isobutene,...

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Published inJournal of the American Chemical Society Vol. 119; no. 18; pp. 4258 - 4262
Main Authors Mildner, Toralf, Ernst, Horst, Freude, Dieter, Hölderich, Wolfgang F
Format Journal Article
LanguageEnglish
Published American Chemical Society 07.05.1997
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Summary:Temperature-jump relaxation magic-angle spinning NMR experiments are for the first time applied to study a heterogeneously catalyzed reaction. A temperature jump from 20 to 100−150 °C creates a nonequilibrium state of the system consisting of methyl tert-butyl ether (MTBE), methanol, and isobutene, which are adsorbed on a boron pentasil zeolite in a sealed glass tube. The rate constants of MTBE decomposition and formation were determined, and the corresponding apparent energies of activation are 51 and 32 kJ mol-1, respectively. The NMR findings are in agreement with experimental results obtained in a fixed bed reactor or in an autoclave.
Bibliography:istex:02E876F283DC680437E3C88608A0F97881F97AAB
ark:/67375/TPS-D9SZMRQN-N
Abstract published in Advance ACS Abstracts, April 15, 1997.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja963355k